Upstreaming browser/ui/uikit_ui_util from iOS.

ios/chrome/browser/ui/uikit_ui_util.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef IOS_CHROME_BROWSER_UI_UIKIT_UI_UTIL_H_
 #define IOS_CHROME_BROWSER_UI_UIKIT_UI_UTIL_H_
 
 #include <CoreGraphics/CoreGraphics.h>
 #import <Foundation/Foundation.h>
 #import <UIKit/UIKit.h>
@@ skipping 124 matching lines @@
 void ApplyVisualConstraintsWithMetrics(NSArray* constraints,
                                        NSDictionary* subviewsDictionary,
                                        NSDictionary* metrics,
                                        UIView* parentView);
 
 // Adds a constraint that |subview| is center aligned horizontally in
 // |parentView|.
 // |subview| must be a subview of |parentView|.
 void AddSameCenterXConstraint(UIView* parentView, UIView* subview);
 
+// Adds a constraint that |subview1| and |subview2| are center aligned
+// horizontally on |parentView|.
+// |subview1| and |subview2| must be subview of |parentView|.
+void AddSameCenterXConstraint(UIView *parentView, UIView *subview1,
+                              UIView *subview2);
+
 // Adds a constraint that |subview| is center aligned vertically in
 // |parentView|.
 // |subview| must be a subview of |parentView|.
 void AddSameCenterYConstraint(UIView* parentView, UIView* subview);
 
 // Adds a constraint that |subview1| and |subview2| are center aligned
 // vertically on |parentView|.
 // |subview1| and |subview2| must be subview of |parentView|.
 void AddSameCenterYConstraint(UIView* parentView,
                               UIView* subview1,
                               UIView* subview2);
+// Whether the UI is configured for right to left layout.
+// The implementation will use the local in order to get the UI layout direction
+// for version of iOS under 9.
+// TODO(jbbegue): Use base::i18n::IsRTL() instead when it will support RTL
+// pseudo language. Remove that method once base::i18n::IsRTL() is fixed.
+// crbug/514625.
+BOOL IsRTLUILayout();
 
 // Returns true if the main application window's rootViewController is a compact
 // iPad horizontal size class.
 bool IsCompactTablet();
 
 // Returns true if the horizontal |sizeClass| is compact and device is an iPad.
 bool IsCompactTabletSizeClass(UIUserInterfaceSizeClass sizeClass);
 
 #endif  // IOS_CHROME_BROWSER_UI_UIKIT_UI_UTIL_H_